desirable material properties are the consequence of these factors hence they ought to be
considered for the sake of sustainability of structures.
Since this was a one-time boom, long term factors were not taken into consideration. The rules
of the competition were to construct a boom that extended at least 1.5 meters horizontally from
the front edge of the anchorage, touched nothing but the anchorage and was anchored in less
than two minutes.
The basic unweighted ratio for the competition was:
However, the determination of the winning design was based on the following:
Under the formula, the best boom finished with the highest ratio and the highest ratio would
finish best in the EG1003 competition. In order to win, a team ought to maximize its ratio.
With the boom weight and anchor time as denominators, the boom was to be as light as
possible and anchored within the shortest possible time. In order to further maximize the ratio,
the boom was to be much longer than 1.5m and carry more load than its weight with minimum
deflection from its original height when loaded. The maximum deflection allowed by the TAs was
20cm from the boom’s original height.
Two thick dowels (1.1cm by 122cm), two thin dowels (0.8cm by 122cm), six bamboo skewers
(30.5cm), 3D printed dowel connectors, cellophane tape and Kevlar string were used to
construct the boom. Saws were also provided to cut the dowels, but these were used by TAs
The EG 1003 C2 section was divided into four teams of three and one team of two. Materials
provided were assessed and design options were considered by teams with competition
specification in mind. Preliminary sketches were made during this period. Next, sketches of
actual basic designs were made in pencil using paper provided by TAs. These designs were
clearly labelled and handed over to TAs who signed and dated them. This was a sign of
approval and teams who had this were free to begin their construction.
First, the six bamboo skewers were secured together using a 3D connector. Next, a 15cm piece
was cut off one of the thick dowels and the rest of the thick dowels were connected via a 3D
connector resulting in approximately a 228cm length. This was inserted horizontally into the
anchorage. The two thin dowels were positioned vertically in the upper anchor points and tied
together at the top using Kevlar string. The 15cm piece was inserted horizontally into back of
the anchorage to serve as opposition to downward deflection. The secured skewers were fitted